81676640

素因数分解:

$2^5\times 5^1\times {\mathrm{631}}^1\times {\mathrm{809}}^1$

素因数の和:1455

約数の個数: 48

約数和(自身を含む): 193505760

約数和(自身を除く): 111829120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 631, 809, 1262, 1618, 2524, 3155, 3236, 4045, 5048, 6310, 6472, 8090, 10096, 12620, 12944, 16180, 20192, 25240, 25888, 32360, 50480, 64720, 100960, 129440, 510479, 1020958, 2041916, 2552395, 4083832, 5104790, 8167664, 10209580, 16335328, 20419160, 40838320, 81676640]

約数ペア:

[(1, 81676640), (2, 40838320), (4, 20419160), (5, 16335328), (8, 10209580), (10, 8167664), (16, 5104790), (20, 4083832), (32, 2552395), (40, 2041916), (80, 1020958), (160, 510479), (631, 129440), (809, 100960), (1262, 64720), (1618, 50480), (2524, 32360), (3155, 25888), (3236, 25240), (4045, 20192), (5048, 16180), (6310, 12944), (6472, 12620), (8090, 10096)]